/*
 * Copyright (C) 2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package vip.justlive.oxygen.core.util.crypto;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * MessageDigest实现的encoder
 *
 * @author wubo
 */
public class MessageDigestEncoder extends BaseEncoder {

  private final String algorithm;

  public MessageDigestEncoder(String algorithm) {
    this.algorithm = algorithm;
  }

  @Override
  protected String doEncode(String source) {
    return Hex.encodeToString(create().digest(source.getBytes(StandardCharsets.UTF_8)));
  }

  private MessageDigest create() {
    try {
      return MessageDigest.getInstance(algorithm);
    } catch (NoSuchAlgorithmException e) {
      throw new IllegalStateException("No such hashing algorithm", e);
    }
  }

}
